Abstract

We demonstrate a CW random distributed feedback Raman fiber laser operating in a 1.2 μm spectral band. The laser generates up to 3.8 W of the quasi-CW radiation at 1175 nm with the narrow spectrum of 1 nm. Conversion efficiency reaches 60%. Up to 1 W is generated at the second Stokes wavelength of 1242 nm. It is shown that the generation spectrum of RDFB Raman fiber laser is much narrower than the spectrum in the system without a weak random feedback.

Figures (6)

Random distributed feedback Raman fiber laser output power from different side of the system: (a) pump laser side and (b) fiber side. Green squares – the first Stokes power in 1060-XP, red and blue squares – the first and second Stokes component in TrueWave correspondingly.